Encircling nets and hoisting nets
Encircling nets are large nets with a floating line that keeps the top of the net on the surface. The bottom rope is weighted with lead. Encircling nets are used to catch schooling fish.
Shoals of fish are encircled from both sides and from below. The shoal becomes enclosed and is heaved on board. With a few exceptions, these nets are used on the surface.
Hoisting nets are horizontal pieces of net or net sacks with an opening at the top. They can be dropped to varying depths, where they are left for a while. The fish are attracted by bait or light. Once enough fish are within the area of the net, it is lifted out of the water.